Packing for piston-rods



(NoModel.)

E. P. LEWIS.

i PACKING PoR- PlsToN Runs. i l No. 523,671. Patented July 31, 1894.

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'UNITED STATES PATENT EEICE.k

l EUGENE E. LEWIS, on NoEwIcII, CONNECTICUT.y

PAcKlNc. FoR Pls'roN-,Rons

SPEGIFICATIN forming part of Letters Patent No. 523,671, dated July 3]1.894'.

` Application filed October 30, 1893. Serial No. 489,526, (llo model.)

To all whom it may concern,.-

:Be it known that I, EUGENE F. LEwIs,a citizen of the United States,residing at Norwich, in the county of New London and State ofConnecticut, have invented certain new v and useful Improvements inPacking for Piston-Rods, which improvements are fully set forth anddescribed in the following specilication, reference being had to theaccompato nying sheet of drawings.

My present invention seeks particularly to provide an improved form ofring-packing for use with piston packingsof the class patented to FrankT. Whaley and myself January 6, 1891, No. 444,002, to the end that moreperfect and reliable steam joints may be made and that the ring segmentsmay wear down thinner than heretofore and continue serviceable. I havealso provided, for use withmy improved zo packing,a simple device forwedging and locking piston-rods Within the cylinder-head; to be broughtinto service intimes of accident, as hereinafter fully explained.

Figure 1, of the annexed drawings, is a side 2 5 elevation of a portionof a cylinder-head, having an extended boss which forms the houslng ofmy packing and also shows a portion of the piston-r0d seated therein.Fig. 2 is a central, longitudinal, sectional, View of the 3o same parts.Fig.'3 is a detached, end, View of the sectional ring-packing and `itscompressing spring, the latter being shown de V'cached in Fig. 6. Fig. 4`illustrates side and end vlews of a washer against which the rear 3 5end of the ring-packing abuts when the'several parts are assembled foruse and Fig. 5 is a detached View of one section of the packing proper,illustrating the Amanner in which said packing is bent and opened toslip itover the 4o piston-rod.

In Figs. 1 and 2 the letter a denotes a portion of a cylinder-head,having its boss b bored to receive the piston-rod c and counterbored toreceive the ring packing and its supports. The packing proper is formedof two rings d d', of soft metal, each having several circumferential Vshaped grooves d2 one only of which iscut entirely through said rino.When itis desired to assemble the various parts the 5o rings d d may bereadily bent and opened (see Fig. 5) until they may be slipped overthepiston-rod. They are then -bent 'back into their original form and areplacedfend'to end, with the V shaped grooves offsetvfrom each other, tobreak joints, a dow'el pinye being 55 y used, preferably, to prevent anysubsequent displacement of the rings relatively to each other. Aroundthe rings ol CZ is then placed `an open spring f which is thickestopposite itsvopen side and is of a width equalto, or 6o slightly greaterthan, the combined thickness of the two abutting rings d d. In the rearof the described ring-packing is a washer g whose central opening isconsider'- ably larger than the piston rod. This washer is shouldered,and extended at its rear end, as

at g. and around this'extension is coiled a spring h one of whose endsabuts the bottom of the counterbore in boss b. Springh seeks constantlyt expand and thus forces the 7o washerg int close engagement with thering 'd and the rear edge of the compression spring f, insuring at alltimes a stem-tightjoint at the rear of the ringpacking.

Immediately at the front ofthe ring d is a I gland i', of ordinary form,that is held in place by a plate 7c which is clamped to the boss b byscrews or bolts 7c. A ring m, of soft metal, v as copper, may beinserted between the outer end of boss b and the inner face of gland i8o which, asl the gland is forced home, will be iiattened and insure atight joint. It should be noted that the compression spring f is firmlyclamped between the gland .and the washer g and that't-he opening ofsaid spring 85 breaks joints with the V shaped cuts of bothk rings d dso that no steam can escapebetween the packing and the gland. Adowel-pin f may be provided to prevent slippingof spring f on thesectional rings. .9o

I will now describe a simple device for locking the piston-rod withintheY cylinder-head, asking reference to Figs. 1 and 2 of the drawings.It .often occurs, with locomotive engines, that one side of the drivingmechanism becomes disabled through accidentand such engines are' run,for a time, by the driving.. mechanism of one side only and it isdesirable then that the piston and valve mechanism of the disabled sideshall be so locked that they Ioo will notl jar loose and move aboutaimlessly and, to accomplish this desirable result, I have provided alock, of wedge form, as seen at ai, having an angle plate n that may befastened by a simple screw n2 to the plate la. When not in use thislocking piece is clamped to the outer face of plate k, with its wedge neX- tending outward, as in Fig. l, but whenever it is desired to utilizesaid piece, to lock the piston-rod against displacement, screw n2 isremoved and the end of the wedge is reversed and forced between thepiston-rod and the Wall of the opening in plate 7c, as seen in Fig. 2.Screw n2 is then inserted and screwed home, `forcing the wedge before itand thus firmly clamping the piston-rod against end- Wisemovement. rThewedge piece adds practically nothing to the cost of an engine, is alwayswithin convenient reach when needed 2o `and is quite as eective asexpensive dogs or clamps nowcornmonly used for the same purose. i g pHaving described my invention, I claim- The herein-described packing forpiston rods, consisting of two rings, each having circumferentialgrooves and so arranged relatively to each other that the grooves ofeach will be opposite the solid parts ofthe other, a spring encirclingsaid rings, a spring-pressed Washer at one side of the rings, a gland atthe otherside of said rings, designed to be clamped to the boss of thecylinder head, and a compressible ring designed to be located betweenthe inner face of said gland and said boss,sub stantially as describedand for the purposes specified.

`Witnesses: p

FRANK H. ALLEN, ALONZO M. LUTHER.

EUGENE F. LEWIS;`

